Scaling law: Difference between revisions

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:<math>\tau_E \propto P^{-\alpha}</math>
:<math>\tau_E \propto P^{-\alpha}</math>


where &alpha; has a value of about 0.7. The reason for this behaviour has not been fully clarified. However, it seems obvious that an increase of ''P'' will lead to an increase of (temperature and density) gradients, and thus an increase of "free energy" available to instabilities and turbulence. This then leads to an increase of transport, producing the observed confinement degradation.  
where &alpha; has a value of 0.6 &plusmn; 0.1. The reason for this behaviour has not been fully clarified. However, it seems obvious that an increase of ''P'' will lead to an increase of (temperature and density) gradients, and thus an increase of "free energy" available to instabilities and turbulence. This then leads to an increase of transport, producing the observed confinement degradation.  
This phenomenon is therefore due to plasma self-organsation (see [[Self-Organised Criticality]]).
This phenomenon is therefore due to plasma self-organsation (see [[Self-Organised Criticality]]).


== References ==
== References ==
<references />
<references />

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